3 Phase Power measurememnt

Discussion in 'Homework Help' started by testing12, Jan 13, 2013.

  1. testing12

    Thread Starter Member

    Jan 30, 2011
    Q) Show that if the power factor of a balanced load is les then 0.5, either W1 or W2 will read a nagative power although the total power is positive.

    This is using "The two watt meter method" for measuring power on a 3 phase 3 wire system. Im not sure how to prove W1 or W2 is negative.